Features
Power
Module
Description
• High power density (L*W*H = 12.19*12.19*3.75)
• Wide operating temperature -40°C to +105°C
at full load
• Efficiency up to 97%, no need for heatsinks
• 6-sided shielding
• Thermally and EMI enhanced 25 pad LGA package
• Compact DOSA-compatible footprint
• Low profile
DC/DC Converter
RPM-3.0
The RPM-3.0 series is a 3A non-isolated switching regulator power module with a full set of features
including adjustable output, sequencing, soft-start control, on/off control, and power good signals. The
ultra-compact module has a profile of only 3.75mm, but with an efficiency of up to 97%, the device can
operate at full load in ambient temperatures as high as +105°C without forced air cooling. The package
is complete with 6-sided shielding for optimal EMC performance and excellent heat management.
3 Amp
Single
Output
Selection Guide
Part
Number
RPM3.3-3.0
RPM5.0-3.0
Input Voltage
Range
[VDC]
3 - 17
3 - 17
Output
Voltage
[VDC]
3.3
5
Vout
Adjust Range
[VDC]
0.9 - 6.0
0.9 - 6.0
Output
Current max.
[A]
3.0
3.0
Efficiency
typ.
[%]
87 - 97
90 - 97
Max. Capacitive
Load
(1)
[µF]
800
800
Notes:
Note1: Max. Cap Load is tested at nominal input and full resistive load
EN55032 compliant
Model Numbering
RPM__-3.0
Output Voltage
max. Output Current
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
BASIC CHARACTERISTICS
Parameter
Internal Input Filter
Input Voltage
Range
Buck mode
100% duty cycle mode
(2)
Vout= Vin - Vdrop
3.3Vout 3.45VDC
5Vout 5.15VDC
3.3Vout
5Vout
3VDC
12VDC
Condition
Min.
Typ.
Max.
capacitor
17VDC
3.45VDC
5.15VDC
20VDC
Absolute Maximum Input Voltage
Undervoltage Lockout (UVLO)
Input Current
Quiescent Current
Internal Power Dissipation
continued on next page
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REV.: 1/2018
DC-DC ON
DC-DC OFF
nom. Vin= 12VDC
3.3Vout
5Vout
3.3Vout
5Vout
2.6VDC
2.8VDC
2.7VDC
2.9VDC
1.0A
1.4A
30µA
2.8VDC
3.0VDC
1.4W
1.6W
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RPM-1
RPM-3.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
Parameter
Output Voltage Trimming
(3)
Minimum Dropout Voltage (Vdrop)
(4)
Minimum Load
Start-up Time
Rise-time
ON/OFF CTRL
Input Current of CTRL Pin
Standby Current
Internal Operating Frequency
Output Ripple and Noise
(5)
Series
Condition
Vin min. = Vdrop + Vout
0%
without using soft start function/ power up
using CTRL function
DC-DC ON
DC-DC OFF
DC-DC OFF
DC-DC OFF
20MHz BW, 80Ω@ 100MHz
below 1 second start up + C
ss
= 3700nF
below 1 second start up without softstart mode
1.6ms
1.5ms
1.4ms
Open or 0.9V<V
CTRL
<Vin
Short or -0.3V<V
CTRL
<0.45VDC
1.2µA
15µA
1.25MHz
60mVp-p
42000µF
800µF
Min.
0.9VDC
Typ.
50mV/A
Max.
6VDC
Absolute Maximum Capacitive Load
Notes:
Note2: As input approaches output voltage set point, device enters 100% duty cycle mode. In 100% duty cycle
mode, Vout equals Vin minus dropout voltage (see Dropout vs. Load graph)
Note3: For more detailed information, please refer to trim table or calculation on page RPM-3
Note4: Required dropout voltage per 1A output current to be within accuracy (see Dropout vs. Load graph)
Note5: Measurements are made with a 22µF MLCC across output (low ESR)
Efficiency vs. Load
RPM3.3-3.0
100
90
80
100
90
80
RPM5.0-3.0
Efficiency [%]
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
3Vin
5Vin
12Vin
17Vin
90
100
Efficiency [%]
70
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
4Vin
5Vin
12Vin
17Vin
90
100
Output Load [%]
Output Load [%]
Dropout Voltage vs. Load
0.14
0.12
Dropout Voltage [VDC]
0.10
0.08
0.06
0.04
0.02
0
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
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REV.: 1/2018
RPM-2
RPM-3.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
Series
OUTPUT VOLTAGE TRIMMING
The RPM series offers the feature of trimming the output voltage over a range between 0.9V and 6V by using external trim resistors. The values
for trim resistors shown in trim tables below are according to standard E96 values; therefore, the specified voltage may slightly vary.
Trim up
Trim
R
up
GND
Trim
+Vout
Trim down
R
down
Vout
nom
Vout
set
V
ref
R
up
R
down
= nominal output voltage
= reference voltage
= trim up resistor
= trim down resistor
[VDC]
Vout
nom
3.3VDC
5VDC
R
1
376kW
344kW
R
2
1kW
R
3
471kW
431kW
V
ref
0.81VDC
= trimmed output voltage [VDC]
[VDC]
[W]
[W]
[W]
R
1
, R
2
, R
3
= internal resistors
Calculation:
R
up
=
R
1
Vout
set
- V
nom
- R
2
R
down
=
(Vout
set
- V
ref
) x R
3
Vout
nom
- Vout
set
Practical Example RPM3.3-3.0:
R
up
=
376k
4.3 - 3.3
- 1k
=
375kW
R
down
=
(1.8
- 0.81) x 471k
3.3 - 1.8
=
311kW
R
up
according to E96
≈
374kW
RPM3.3-3.0
Trim up
Vout
set
=
R
up
(E96)
≈
3.5
1M87
3.7
931k
3.9
619k
4.1
464k
4.3
374k
R
down
according to E96
≈
309kW
4.5
309k
4.7
267k
5.0
221k
5.5
169k
6.0
137k
[VDC]
[W]
Trim down
R
down
(E96)
≈
Vout
set
=
3.0
3M40
2.7
1M47
2.5
1M
2.2
590k
2.0
432k
1.8
309k
1.5
182k
1.2
86k6
1.0
39k2
0.9
17k4
[VDC]
[W]
RPM5.0-3.0
Trim up
Vout
set
=
R
up
(E96)
≈
5.1
2M21
5.2
1M33
5.3
976k
5.4
750k
5.5
619k
5.6
523k
5.7
453k
5.8
402k
5.9
357k
6.0
324k
[VDC]
[W]
Trim down
R
down
(E96)
≈
Vout
set
=
4.5
3M16
4.0
1M37
3.5
768k
3.3
634k
2.5
294k
1.8
133k
1.5
84k5
1.2
44k2
1.0
20k5
0.9
9k53
[VDC]
[W]
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REV.: 1/2018
RPM-3
RPM-3.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
Series
REMOTE SENSE
RW
1
+V
in
+V
in
+V
out
+Sense
Trim
R
down
R
up
+V
out
The output voltage can be adjusted via the trim and
sense functions.
The maximum output voltage from Trim and Sense
function combined is 5.5VDC. Derating may be
required when using Trim and/or sense functions.
GND
GND
GND
GND
RW
1
... wire losses +
R
up
... trim up resistor
R
down
... trim down resistor
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
Soft-Start Time
Transient Response
100% - 10% load step
recovery time
25% load step change
recovery time
low line to high line, full load
0% to 100% load
Condition
Value
±3.0% max.
0.25% typ. / ±3.0% max.
0.5% typ. / 3.0% max.
refer to soft-start capacitor calculation
200mV max.
6ms typ.
150mV max.
500µs typ.
Sequencing Multiple Modules
The SEQ pin can be used to program the rising edge of the output voltage. An internal current source charges a soft-start capacitor which
is connected from the sequencing pin to GND. The following equation is used to calculate the soft-start capacitor:
C
ss
I
ss
t
ss
n
= soft-start capacitor
= sum of all soft-start currents of all sequenced modules
= required soft-start time
= number of RPMs
C
ss
=
t
ss
x I
ss
1.25V
- n x 3.3nF
Note: there is a 3.3nF internal soft-start capacitor, and there are different constant
current sources in the modules which leads to different preset soft-start times.
I
ss
[µA]
Min.
4.5
Typ.
5.0
Max.
5.5
Preset soft-start time [µs]
Min.
750
Typ.
825
Max.
920
continued on next page
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REV.: 1/2018
RPM-4
RPM-3.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
To sequence multiple power module start-up times the power good (PGood) pin and the CTRL pin may be used. In below schematic,
the RPM(n) starts after RPM(1) reaches its set output voltage and the power good signal is set to high which then enables RPM(n).
After RPM(n) reaches its set output voltage, it enables RPM(n+1).
V
in
FB1
C1
C2
Series
RPM(1)
V
in
V
out
Sense
CTRL
PGood
Trim
GND2
GND3
NC
FB2
C3
V
out(1)
CTRL
SEQ
GND1
V
in
FB3
C4
C5
RPM(n)
V
in
V
out
Sense
CTRL
SEQ
GND1
GND3
PGood
Trim
GND2
NC
FB4
C6
V
out(n)
V
in
FB5
C7
C8
RPM(n+1)
V
in
V
out
Sense
CTRL
SEQ
GND1
GND3
PGood
Trim
GND2
NC
FB6
C9
V
out(n+1)
To sequence multiple converters to start at the same time (set output voltage is reached at the same time), the following schematic may be used:
FB1
C1
C2
CTRL
SEQ
GND1
GND3
RPM(1)
V
in
V
out
Sense
PGood
Trim
GND2
NC
V
in
FB2
C3
V
out(1)
CTRL
V
in
C4
FB3
C5
CSS
RPM(n)
V
in
V
out
Sense
CTRL
SEQ
GND1
GND3
PGood
Trim
GND2
NC
FB4
C6
V
out(n)
V
in
C7
FB5
C8
RPM(n+1)
V
in
V
out
Sense
CTRL
SEQ
GND1
GND3
PGood
Trim
GND2
NC
FB6
C9
V
out(n+1)
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REV.: 1/2018
RPM-5
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